From TruthSocial, 5AM ET:

Kalshi betting odds on number of ships through Strait of Hormuz through April 5:

Source: Kalshi, accessed 4/5/2026, 11:30 AM CT. Notes: Orange arrow at 4 AM CT, 5 AM ET.

There is no indication that prediction markets took the threat seriously, and indeed the expected number of ships transiting the Strait declined.